Features found on the topographic map of Mt. Tom, California:

• Arete - There is one well defined arete, indicated on the map by closely spaced contour lines revealing a steep sided ridge. This arete is bordered by two cirques and the U-shaped valleys that extend downhill away from the cirques.
• Cirques - There are two cirques on the map. The semicircular shape of the contour lines indicates the bowl shape of a cirque. The close spacing of brown contour lines shows the headwall or the back-wall of the cirque, and in both cases, the headwall is quite steep. Both cirques contain small cirque glaciers.
• Glaciers - There are two glaciers shown on the map by a white (ice) background and blue contour lines.
• Moraine Deposits - There are two sets of moraine deposits fronting the two glaciers. The unconsolidated material typical of moraines is indicated by brown dots/speckles on the map. These may be examples of either end moraines or of ground moraine.
• U-shaped valley or glacial trough - These are located to the northeast (north is up) of the two glaciers marked on the map. The northernmost U-shaped valley contains the larger of the Upper Horton Lakes and an orchard, shown by the green circles. The U-shaped valleys have widely spaced contour lines indicating a relatively flat valley bottom, with more closely spaced contour lines indicating the steep valley sides.